Practice Test

Q1) If C, F and K are temperature on Celsius, Fahrenheit and Kelvin scales, DC, DF, and DK are the change in temperature in Celsius, Fahrenheit and Kelvin scales respectively , the correct relation among the following is Show Answer

Q2) Radiation from which of the following sources, approximates black body radiation best? Show Answer

Q3) Which of the following qualities are useful for a cooking utensil?
Show Answer

Q4) Triple point is the temperature at which Show Answer

Q5) The fastest mode of transfer of heat is Show Answer

Q6) The sprinkling of water reduces the temperature of a closed room because Show Answer

Q7) A perfectly black body when heated to extremely high temperature, it appears Show Answer

Q8) At a common temperature, a block of wood and a block of metal feel equally cold or hot. The temperatures of block and wood are Show Answer

Q9) The presence of gravitational field is required for the heat transfer by Show Answer

Q10) Which of the following circular rods (given radius r and length l) ,each made of the same material and whose ends are maintained at the same temperature will conduct most heat? Show Answer

Q11) For the construction of a thermometer , one of the essential requirements is a thermometric substance which Show Answer

Q12) A star which appears blue, will be Show Answer

Q13) A small portion of an iron sphere is painted black. the sphere is then heated to a high temperature in a dark room. Which one of the following statements is correct ? Show Answer

Q14) Which zone of a candle flame is the hottest?
Show Answer

Q15) Why do two ice blocks join to form one block when pressed together? Show Answer

Q16) It is difficult to cook at high altitude, because Show Answer

Q17) A solid sublimates when its boiling point is Show Answer

Q18) The temperature of the sun is measured with Show Answer

Q19) A refrigerator is a Show Answer

Q20) Two spheres of same size are made of the same metal but one is hollow and the other is solid. They are heated to same temperature, then Show Answer

Q21) The factor not needed to calculate heat lost or gained when there is no change of state is Show Answer

Q22) In first law of thermodynamics Show Answer

Q23) Arrange in ascending order of work done Show Answer

Q24) According to the kinetic theory of gases, the pressure exerted by a gas on the walls is measured as Show Answer

Q25) The source and sink temperatures of a Carnot engine are 400K and 300 K, respectively . What is its efficiency? Show Answer

Q26) A Carnot's engine works as refrigerator between 250 K and 300 K. If it receive 750 calories of heat from the reservoir at the lower temperature, the amount of heat reject at the higher temperature is Show Answer

Q27) Which of the following parameters does not characterize the thermodynamic state of matter? Show Answer

Q28) The small ozone layer on the top of stratosphere is crucial for human survival as it Show Answer

Q29) The instrument used to measure the temperature of the source from its thermal radiation is Show Answer

Q30) The presence of gravitational field is required for the heat transfer by Show Answer

Q31) A closed compartment containing gas is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then the pressure in the compartment is Show Answer

Q32) Two metal strips that constitute a thermostat must necessarily differ in their Show Answer

Q33) Two metal strips that constitute a thermostat must necessarily differ in their Show Answer

Q34) Colour of shining bright star is an indication of its Show Answer

Q35) The radiation energy density per unit wavelength at a temperature T has a maximum at a wavelength 10. At temperature 2T, it will have a maximum at a wavelength : Show Answer

Q36) If the door of a running refrigerator is kept open, then which of the following is true? Show Answer

Q37) the surface of a lake is frozen in severe winter, bit the water as its bottom is still liquid. What is the reason? Show Answer

Q38) Cloudy night are warmer compared to clear cloudless night because clouds Show Answer

Q39) The clouds float in the atmosphere because of their low Show Answer

Q40) Low temperatures (cryogenics) find application in Show Answer

Q41) Consider the following statements:
1) Some bodies may contract o heating.
2) Water shows anomalous expansion.
Which of the statements given above is/are correct? Show Answer

Q42) Consider the following statements:
The fog during winter season is more on the day when:
1) sky is clear
2) sky is cloudy
3) wind is blowing
Which of the statements given above is/are correct? Show Answer

Q43) Which of the following processes result in cooling?
1) Evaporation of liquid
2) Compression of gas
3) Shaking a liquid in a vessel
4) Adiabatic expansion of a gas
Select the correct answer using the code given below:
Show Answer

Q44) A gas can be liquefied by increasing the pressure
1) above the critical pressure only.
2) only when the temperature of the enclosed gas is below the critical temperature.
3) only when the volume of the enclosed gas is below the critical volume,
Which of the statements given above is/are correct? Show Answer

Q45) Which of the following statements is/are true?
1) Absolute zero temperature is zero energy temperature. 2) Two different gases at the same temperature pressure have equal root mean square velocities.
3) The root mean square speed of the molecules of different ideal gases, maintained at the same temperature are the same.
4) Given sample of 1cc of hydrogen and 1 cc oxygen both at NTP; oxygen sample has a large number of molecules. Show Answer

Q46) From the following statements, concerning ideal gas at any given temperature T, select the correct ones
1) The coefficient of volume expansion at constant pressure is same for all ideal gases.
2) The average translation kinetic energy per molecule of oxygen gas is 3KT (K being Boltzmann constant)
3) In a gaseous mixture, the average translational kinetic energy of the molecules of each component is same .
4) The mean free path of molecules increases with the decrease in pressure. Show Answer

Q47) Consider the following statements: A body is in equilibrium in an inertial frame but not be equilibrium in an non-inertial frame.
2) The body can be in thermal equilibrium in both the frames.
3) For the thermal equilibrium of two bodies , they must be in contact.
Which of the statements given above is/are correct? Show Answer

Q48) Consider the following statements:
1) Two bodies in contact must be in thermal equilibrium.
2) A tightly closed metal lid of a glass bottle can be opened more easily if it is put in hot water for sometimes
3) The coefficient of expansion of metal lid is greater than that of glass.
Which of the statements are correct? Show Answer

Q49) Consider the following statements:
1) Fahrenheit is the smallest unit measuring temperature.
2) Fahrenheit was the first temperature scale used for measuring temperature.
3) The temperature at which Centigrade and Fahrenheit thermometers read the same is - 40 Degree.
Which of the statements are correct? Show Answer

Q50) Consider the following statements:
1) Water kept in an open vessel will quickly evaporate on the surface of the moon.
2) The temperature at the surface of the moon is much higher than boiling point of the water.
3) Two bodies at different temperatures, if brought in contact do not necessary settle to the mean temperature.
4) The two bodies may have different thermal capacities.
Which of the statements are correct? Show Answer

Q51) Consider the following statements:
1) Heat is a conserved quantity.
2) Energy of an isolated system remain conserved.
3) When solid melts or a liquid boils, the temperature does not increases when heat is supplied.
4) The heat supplied is used to increased internal potential energy.
Which of the statements are correct? Show Answer

Q52) Assertion : Specific heat capacity is the cause of formation of land and sea breeze.
Reason : Specific heat of water is more than land. Show Answer

Q53) Assertion : Air quickly leaking out of a balloon becomes cooler.
Reason : The leaking air undergoes adiabatic expansion. Show Answer

Q54) Assertion : The bulb of one thermometer is spherical while that of the other is cylindrical. Both have equal amount of mercury. the response of the cylindrical bulb thermometer will between quicker
Reason : Heat conduction in a body is directly proportional to cross-sectional area.
Show Answer

Q55) Assertion : Water gets heated quickly although it is a bad conductor of heat.
Reason : Water gets heated mainly by the mode of convection Show Answer

Q56) Assertion : The atmosphere is heated more by terrestrial radiation than by incoming solar radiation .
Reason : Water vapor and carbon dioxide in the atmosphere are good absorbers of short wave radiation. Show Answer

Q57) Assertion : Two thin blanket put together are warmer than a single blanket of double thickness.
Reason : Thickness increases because of air layer enclosed between the two blankets. Show Answer

Q58) Assertion : Water is used as a coolant in a vehicles.
Reason : Water has low specific heat capacity Show Answer

Q59) Assertion : A piece of copper and a piece of glass are heated to the same temperature. When touched, thereafter, the copper piece appears hotter than the glass piece.
Reason : The density of copper is more than that of glass.
Show Answer

Q60) Assertion : The boiling of cooper is more than that of glass.
Reason : The atmospheric pressure increases with altitude Show Answer

Q61) What temperature is the same on celsius scale as well as on Fahrenheit scale? Show Answer

Q62) What is the principle by which a cooling system (Radiator) in a motor car works? Show Answer

Q63) Two bodies at different temperatures are mixed in calorimeter. Which of the following quantities remain conserved ? Show Answer

Q64) When hot tea is mixed with cold tea, the temperature of the mixture Show Answer

Q65) Assertion (A) Water stored in pitchers are cold is summer season.
Reason (R) Evaporation causes cooling. Show Answer

Q66) Consider the following
1) Carbon dioxide
2) Oxides of Nitrogen
3) Oxides of sulphur
Which of the above is/are emission/emissions from coal combustion at thermal power plants ? Show Answer

Q67) If a potato is placed on a pure paper plate which is white and unprinted and put in a microwave oven, the potato heats up but the paper plate does not. This is because Show Answer

Q68) Assertion (A) Evaporation leads cooling of the water
Reason (R) An amount of energy supplied by water to its evaporating molecules
Which one of the following is true ? Show Answer

Q69) Assertion (A) Zeroth law of thermodynamics is the definition of temperature.
Reason (R) It is related to heat transferred from the body to another body.
Which are of the following is true ? Show Answer

Q70) Consider the following statements
1) Sublimation is direct conservation of solid into its vapour state.
2) The atmospheric pressure decreases with altitude.
3) Boiling takes places at a constant temperature is called boiling point for a given material
4) Cooling rate is directly proportional to the temperature difference of the body and its surroundings/
Which one of the options is correct ? Show Answer

Q71) Which one curve represents the relation between Celsius and Fahrenheit temperature ? Show Answer

Q72) Assertion (A) Internal energy of gases r increased.
Reason (R) Heat is supplied to the gases.
Which of the following is correct ? Show Answer

Q73) Which of the following quantities is the same for all ideal gases at the same temperature ?
1) The kinetic energy of 1 moles gas.
2) The kinetic energy of 1 g.
3) The number of molecules in 1 mole.
4) The number of molecules in 1 gm.
Choose the correct option.
Show Answer

Q74) The temperature of body of normal healthy pressure is Show Answer

Q75) Assertion (A) In winter season, we wear the woolen clothes.
Reason (R) These are power conductor of heat.
Which one of the following is true ? Show Answer

Q76) Consider the following statements
1) A heat refrigerator takes heat from hoter body and rejects it to the colder body.
2) A heat pump takes heat from a colder body and rejects it to a hoter body.
3) Calories is SI unit of heat.
4) 1 J = 4.2 cal.
Which of the statement(s) are correct ? Show Answer

Q77) Consider the following statements
1) Steam at 100degree C and boiling water at 100 degree C contain same amount of heat.
2) Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
3) In an air-conditioner, heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils.
Which of these statements is/are correct ? Show Answer

Q78) A hollow sphere of radius R a hollow cube of side R and a thin circular plate of radius R, and a thin circular plate of radius R, made up of the same material, are all heated to 20degree C above room temperature. When left to cool in the room, which of them will reach the room temperature first ? Show Answer

Q79) What temperature is the same on Celsius scale as well as on Fahrenheit scale? Show Answer

Q80) Minerals are- Show Answer

Q81) Which one of the following pairs is not correctly matched : Show Answer

Q82) Which one of the following is not correct : Show Answer

Q83) Cyclotrons are used to accelerate : Show Answer

Q84) Among the following radiations, which has the highest energy ? Show Answer

Q85) Stars obtain their energy from:
1. Nuclear fusion
2. Gravitational contraction
3. Chemical reaction
4. Nuclear fission
Select your answer from the codes given below: Show Answer

Q86) Consider the following statements :
In a nuclear reactor, self-sustained chain reaction is possible, because.
1. more neutrons are released in each of the fission reasctions.
2. the neutrons immediately take part in the fission process.
3. the fast neutrons are slowed down by graphite.
4. every neutron released in the fission reaction initiates further fission.
Which of these statements are correct ? Show Answer

Q87) The difference between nuclear reactor and atom bomb is that :
Show Answer

Q88) The important nuclear fuel available in India in abundance is : Show Answer

Q89) Radioactive element which has been found to have large reserves in India is Show Answer

Q90) To meet its rapidly growing energy demand some opine that India should pursue research and development on thorium as the future fuel of nuclear energy. In this context, what advantage does thorium hold over uranium?
1. Thorium is far more abundant in nature than uranium.
2. On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium.
3. Thorium produces less harmful waste compared to uranium.
Which of the statement(s) given above is/are correct? Show Answer

Q91) Identify the mineral not associated with atomic power. Show Answer

Q92) Which of the following is not a fuel element? Show Answer

Q93) The principle of atomic bomb is based on Show Answer

Q94) The working principle of atom bomb is nuclear fission of uranium and the working principle of hydrogen bomb is : Show Answer

Q95) Hydrogen bomb is based on the principle of
Show Answer

Q96) The half life of a radioactive substance is 10 days; it means there will be : Show Answer

Q97) Which metal can be used for producing electricity? Show Answer

Q98) India's first atomic power station is - Show Answer

Q99) Who is present director of 'BARC'? Show Answer

Q100) What links Dhruva, Purnima and Cirus ? Show Answer

Q101) Which fuel is used by Nuclear reactors in India ? Show Answer

Q102) The Indira Gandhi Atomic Research Centre is located in Show Answer

Q103) The atomic power plants are located at-
Select the correct answer from the codes given below :
1. Narora
2. Ghatshila
3. Kalpakkam
4. Nangal Show Answer

Q104) Which one of the following atomic plants of India is located into the IV Seismic Zone ? Show Answer

Q105) The atomic power plant which became active recently, is located at: Show Answer

Q106) Russia has agreed recently to construct how many units of nuclear reactors at Kundankulam in Tamil Nadu ? Show Answer

Q107) The fuel used in Fast Breeder Test Reactor at Kalpakkam is Show Answer

Q108) What is true for Kalpakkam Fast Breeder Reactor ?
1. In it, only nature uranium is used as a fuel.
2. In it, Plutonium carbide and natural uranium carbide mixture is used as a fuel.
3. More than 200 M. Watt atomic electricity would be produced from it.
Choose the correct answer from the following alternatives. Show Answer

Q109) Otto Hahn discovered atom bomb by the principle of Show Answer

Q110) Recently, the USA decided to support India's membership in multi-lateral export control regimes called the 'Australia Group' and the 'Wassenaar Arrangement'. What is the difference between them?
1. The 'Australia Group' is an informal arrangement which aims to allow exporting countries to minimize the risk of assisting chemical and biological weapons proliferation, whereas the 'Wassenaar Arrangement' is a formal group under the OECD holding identical obejctives.
2. The 'Australia Group' comprises predominantly of Asian, African and North American Countries whereas the member countries of 'Wassenaar Arrangement' a pre-dominantly from the European Union and American continents.
Which of the statements given above is/are correct? Show Answer

Q111) Which one of the following is used as the coolant in the ‘Fast Breeder Test Reactor’ at Kalpakkam : Show Answer

Q112) The function of heavy water in a nuclear reactor is to Show Answer

Q113) Which one of the following is used as a moderator in the nuclear reactor? Show Answer

Q114) The characteristic of super conductor is Show Answer

Q115) At which temperature superconductivity can be of tremendous economic interest saving billions of rupees: Show Answer

Q116) The newly discovered high temperature super conductors are Show Answer

Q117) Which technology of the 21st century can do wonders in device miniaturization ? Show Answer

Q118) Which one of the following statements is correct? Show Answer

Q119) What is the location of the Enron Power Project? Show Answer